charlton



{No.Model.)

0.;1. CHARLTON, Jr. & J. F. CHARLTON.

NUT LOCK.

N0. 605,078. Patented June 7,1898.

X a z YHE NORRIS PETERS CD PHOTQ-LITHO WASHING N D C U IT D ST TES CHARLES H. CHARLTON, JR,-

PATENT Fries.

NUT-LOCK.

SPECIFICATION forming part bi" Letters Patent No. 605,078, dated June 7, 1898.

' A lication filed August 1?,18957. slilhN. 648,563.] indmtari T at whom it may concern.-

Be it known that we, CHARLES H. CHARL- TON, J r., and J OHN F. CHARLTON, citizens of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Nut-Locks and We do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the' art to which it appertains to make and use the same.

Our invention relates to improvements in nut-locks; and it consists in the novel ,de vices hereinafter described and'claimed fi Our invention will be understood byreference to the accompanying drawings, wherein the same parts are indicated by the same letters throughout the several views.

Figure 1 represents a side view of a bolt having the nut and nut-lock applied thereto. Fig. 2 is an end view of the same as seen from the right in Fig. 1. Fig. 3 is a view of the bolt and nut with thenut-lock as seen from the top of the sheet inv Fig. 1. Fig. 4 is a side view of the screw-threaded end of the bolt, showing one of the grooves therein. Fig. 5 is an end view of the same as seen from; the right in Fig 4,'and Fig. 6 is a perspective 1 view of the locking-plate.

The bolt A is providedwith the usual screwthreaded portion A, in which, however, there is formed one or more longitudinal grooves a, as shown in Figs. 2, 3, 4., and 5.

The nut may be of any ordinary construction or shape, provided with internal screwthreads adapted to engage the screw-threaded end of the-bolt, as shown in Figs. 1, 2, and 3.

The locking-plate or look consists of a me tallic plate 0', having a central opening 0, adapted to fit over the screw-threaded end of the bolt andprovided with one or more lugs c, which project into saidcentral opening, and are adapted to take into the groove or grooves a on the screw-threaded portion of the bolt, so that the said plate may beplaced over the end of the bolt by fitting the lug or lugs into the groove or grooves on the screwthreaded portion of the bolt. It will thus be seen that when the saidplate has been so fitted upon the end ofthe bolt it'will'be held against'turning by the said lugs thereon.

P 1% orm e edges Qtthe plate 0 there is formed a curved spring-arm 0. (Shown most clearly in Fig. 6.) This spring-arm is so arranged that when the plate 0 is in position upon the bolt and the nut B has been screwed down thereon the said nut may turn forward, the corners thereof passing up the inclined surface 0 of the said spring-arm and arm or arms 0 must be bent downward suf-' ficientlyto allow the corners of the nut to pass over the end 0'. thereof.

It will thus be seen that we provide a very cheap and simple device for looking a nut against turning backward upon its bolt, and v,the many advantages thereof will be apparent to any practical i'nind. "fll-laving thus described our invention, what we claim, and desire to secure by Letters Patent of the United States'is 1.;In a nut-lock, the combination with a bolt having a longitudinal groove along its screw-threaded portion; of a metallic plate provided with an opening adapted to' fit over said'screw-threaded portion of the bolt, and havinga lug extending into said opening, adapted to take in said grooveon the bolt;

and a spring-arm at one side of saidplate bent first toward the back of the plate and then toward the front and having its free end extending outward from the face of the said plate, substantially as described.

2. In a nut-lock the combination with a bolt having a plurality of longitudinal grooves alongits screw-threaded portion; of a metallicplate provided with an opening adapted to fit over said screw-threaded portion of the bolt, and havinga plurality of lugs extending into said opening adapted to take in said thes'aidIspring-arm returning to its normal grooves in the bolt; and a plurality of spring arms upon side edges of said plate bent first toward the back of the plate and then toward the front and having their free ends extending outward from the face of the said plate, substantially as described.

3. A combined nut-lock and washer comprising the fiat metallic plate 0, having central opening 0", and lugs c protruding into said opening; and spring-arms O bent first toward the back of the plate and then toward the front and having their free ends 0' extending outward from the face of the said plate, substantially as described.

l. A combined nut-look and washer comprising a flat metallic plate having a central opening therethrough for the passage of the belt; a plurality of lugs thereon protruding into said central opening; and a plurality of spring-arms upon side edges of said plate bent first toward the back of the plate and then toward the front and havii'ig their free ends turned outward from the face thereof, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

CHAS. II. CHARLTON, JR. JOHN F. CHARLTON. \Vitnesses:

Janus W. Monmssnr, JOHN J. SAUCIER. 

